Rod-bending machine.



G. J. ORONANDER.

ROD BENDING MACHINE.

APPLICATION FILED F111;.11, 1911.

Patented Jan. 14, 1913.

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FLANOCIRAPH C0 WASH] C. J. GRONANDER.

ROD BENDING MACHINE.

APPLICATION FILED PEB.11, 1911 1,050,348. Patented Jan. 14, 1913.

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wwmww 6 W COLUMBIA PLANOGRAPH c0 WASHINGTON, D. :4

UNITED STATES PATENT OFFICE.

CARL J. CRONANDER, 0F MOLINE, ILLINOIS, ASSIGNOR TO MOLINE PLOW COMPANY, A CORPORATION OF ILLINOIS.

ROD-BENDING MACHINE.

To all whom it may concern:

Be it known that I, CARL J. CRONANDER, a citizen of the United States, and a resident of Moline, county of Rock Island, and State of Illinois, have invented a new and useful Improvement in Rod-Bending Machines, of which the following is a specification.

This invention relates to metal bending machines and is adapted, particularly, for forming eye-rods of the character commonly employed in agricultural implements, and the like.

The invention comprises, generally speaking, a suitable support adapted to sustain a power device which actuates a reciprocating member within which is supported a bender-carrying element, the position of which, relative to a rod-supporting block, is controlled by the position and movement of said reciprocating member. In this instance, the bender-carrying element moves longitudinally with the said reciprocating member and, then, at a predetermined position, is rotated, whereby the rod is bent or twisted around an arbor carried by the rod-supporting block.

The invention comprises, further, mechanism for controlling the movements of said reciprocating member and adjunctive parts.

The invention further comprises mechanism for controlling the positioning and actuation of the operating parts, whereby said reciprocating member is intermittently actuated to position the bender-carrying element relatively to the rod-supporting block.

The invention further comprises the novel arrangement and aggroupment of parts, all as hereinafter more particularly described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of an eye-rod bending machine embodying my invention, the parts being shown in their initial or starting position; Fig. 2 is a similar view illustrating the parts in the position they occupy at the completion of the bending operation but just before the spindle and its operating parts are returned to the starting position; Fig. 3 is a top plan view of the machine; Fig. 4 is a bottom plan view of the same; Fig. 5 is a longitudinal vertical section on the line 55, Fig. 3; Figs. 6, 7 and 8 are fragmentary views of the rod-supporting Specification of Letters Patent.

Application filed February 11, 1911.

Patented Jan. 14., 1913.

Serial No. 608,148.

block, and of the rod-bending elements carried thereby and by the bending-die, and illustrating the successive positions of the parts in gaging the rod, bending the same, and completing the loop or eye; Fig. 9 is an enlarged, bottom plan view of the segmental gear, the clutch device, and the mechanism for efiecting engagement and disengagement of the clutch and segmental gear; Fig. 10 is a fragmentary view, in sectional elevation, the section being taken on the line 1010, Fig. 9, looking in the direction of the arrow; Fig. 11 is a sectional elevation of the machine, the section being taken on the line 1111, Fig. 1; and Fig. 12 is a detached vertical section of the segmental gear, showlng, particularly, the spring-actuated clutch pm.

In these drawings: the numeral 1 designates a bed-plate supported on legs or standards 2, these parts constituting the frame of the machine.

J ournaled in suitable bearings 3, 3, on the underside of the bed-plate is a shaft 4, which carries, at one end, a collar 6 adjustably secured thereon by a set screw 7 (Fig. At the opposite end, the axle carries a drive Wheel 8 adapted to rotate constantly in the direction indicated by the arrows in Figs. 1 and 2 and driven by any suitable means.

Fast to the shaft 4: and intermediate of the drive-wheel and collar, is a clutch disk 9. Arranged in juxtaposition to this disk,and loosely carried on the axle, is a segmental gear 10, provided with a slot 11 in which is housed a spring 12 adapted to bear, at one end, against a projection or lug 13 carried by a clutch pin 14 which slides in an openended slot 15 extending through the seg mental gear parallel to the axis thereof. The clutch pin is provided, at one end, with an L-shaped extension 14 formed with a cammed surface 14", whereby the engagement therewith of parts hereinafter described is facilitated.

Loosely carried by the shaft 4; are two juxtaposed disks 20 and 21. The disk 21 is normally stationary, and disk 20, loosely carried by the shaft 4, is adapted to have a limited rot-ative movement around the shaft 4, such movement being controlled by a treadle device 18, which is connected to the disk 20 by means of links 16 and 17. The link 16 is fulcrumed at 16 to a depending portion 16 of the bed-plate A spring 19 for ettecting the rotative move ient of the disk 20 is connected at one end to the standards or legs 2 and at its opposite end to the links 16 and 17 at their point of juncture 17. The disks are disposed in a plane parallel with the side of the segmental gear and are ottset to provide eamined extensions 20 on disk 20 and 21 on disk 21 (Figs. 10 and 11) disposed in the path of the L-shaped portion of the clutch pin 14:. It will be understood that, when the treadle 18 is depressed by the operator, the link mechanism is thereby 0perated to e'tlect a rotative movement of the disk 20 upwardly and thereby shift the extension 20 out of engagement with the l.- shaped portion of the clutehpin 1st, which permits this pin it to be actuated, under the action of the spring 12, so that its engaging end l l will be positioned in the path of a lug 9, carried by the clutch disk 9 Fig. 11). Thereby, the segmental gear and clutch disk 9 are engaged to cl'lcct a rotative movement of the gear. hen the gear, with the connected clutch disk D has reached a position in its rotative movement diametrically opposite thatat which an engagement of the disk and gear was eti'ected, the clutch pin 14 en gages the oli'set cammed portion 21 of the disk 21, whereby the clutch pin is shifted and disconnected trom engagement with the lug 9, permitting the tree rotative movement of the clutch disk 9.

lilounted upon the upper face of the bedplate are two inverted l..l-shaped guides 22 and 22 connected by a longitudinal strip 22 in which an elongated reciprocating member 23 or sleeve is adapted to he slidably supported. This member is provided atone end with a sleeve 24: fixed thereto, and is provided also with a spiral groove 27 liftovably supported within the reciprocating member 23 and the grooved sleeve 24: is a spindle 26 provided with an upstanding pin 27 carrying a roller 2T adapted to move in the spiral groove 25 in the sleeve 2 t. By this means, the spindle is given a rotative movement, will n'esently be more fully explained. The reci 'irocatingmember 23 is provided, on its under face, with a rack 23 with which the segmental gear 10, already referred. to, is adapted to engage. The spindle 26, at its forward. end, carries a suitable bendenhead 28. The opposite end 01? the spindle provided with a collar 29 retained on the spindle by a gin 30, and is provided also with a bu titer 29 This butter is adapted to limit the rearward movement of the sleeve 23 and cushion the same when it returns to starting position.

The bed-plate is provided with a bracket 31 constituting a butter 31 for the rear end of the spindle when it is returned to its starting position. The spindle is provided with sockets or recesses 26 and 26 adapted to receive a ball 32 housed within an up standing member 33, the ball being controlled by a spring 3 L, also housed within said member. This device constitutes a in cans for intermittently connecting;- the reciprocating parts with the spindle, whereby the latter is caused to be actuated with the reciprocating parts.

lllounted on the upper face of the bedpate l is a bracket 35, upon which is piv cted a link :35, and to this is jointed an arm 37 pivotally connected at 38 to the spirally- QL'OOYQtl sleeve Connecting; with the arm 37, at one end, is a spring 39 for returning the sleeve 2st to its original starting position atter the bending; action has been completed, which spring at its opposite end, is attached to an adjustable tension device 40 carried by a bracket all secured to the upper surface of the bed-plate. The spindle extends through a guiding bearing 42 upstanding from the bed-plate, at its forward end, and, beyond the bearing, carries the bender-head 28, already referred to.

A. bracket 43 is mounted at the forward end of the bed plate and has adjustably mounted therein, by means of a set screw to, a horizontal arbor -14, the inner end, 4114*, of which is cylindrical and projects in wardly beyond the face of the bra cket, thereby constituting a mandrel or die, about which the stock is adapted to be bent, as will be presently described. Adj-ustably secured on the bracket 4:3 is a stock gage 46, retained. in position by an adjusting screw LT. illounted on the inside face of the bracket 4-3, and adapted to be adjusted thereon, is a rod-engaging member or block t8, forming the second element of the atorementioned bending device. This extends inwardly toward. the arbor and its lower end is curved, as shown in F s. (3 to S. The adjustment of the member l-S toward or away from the arbor is permitted by the provision of an adjusting: bolt 4:9.

The bender-head 28 is provided with. a central aperture 50, adapted when the head is moved up to the mandrel, to receive an eccentrically lo :ated centering pin, 4 on the end of the mandrel. The hendcnhead is also provided with an adji'istable bender die or block 51, forming the third element of the atorementioned bending device. The rod-engaging; end 51 of the member 51 is preferably curved to facilitate its sliding engagement a. it bends the rod. The block 51 is retained by an adjusting screw 51. An additional. retention thereof is e'lt'ected by an adjusting screw 52, in. a plate The screw 52 is adapted to retain the block against outward displacement.

Operation: Assuming that the parts of the machine are in the position shown in if 1, and that the proper length of rod has been inserted between the member 418 and the mandrel 41*, and against the gage member 4L6, the operator, by means of the treadle mechanism 18, releases the clutch pin, in the manner already described, thus positioning it into the path of travel of the lug 9 carried by the clutch disk 9. Thereupon, the segmental gear is rotated a halfcircle, during which movement it drives the sleeve 23 forward, and with it the spindle (temporarily locked therewith by means of the spring-pressed ball 32) until the bender-head reaches its limit of movement, which is determined by the seating of the centering pin 14 in the recess 50 in the bender-head. The continued movement of the sleeve 23 forces the ball 32 out of the recess 26 and along the surface of the spindle until it arrives at the recess 26, into which it then becomes seated. In the interim, the roller 27 on the pin 27 is caused to travel in the spiral groove 25 and this effects a rotative movement of the spindle 26, and of the bender-head 28. By such rotative movement of the bender-head, the bender block 51 is engaged with the portion of the rod lying between the member 48 and the gage 16, as shown in Fig. 6, and bends the same, in its traveling movement, around the mandrel. hen said bender block reaches the position shown in Fig. 7 the body portion of the rod is carried with it and into engagement with the bender block d8, whereby the loop is centered relatively to the body portion of the rod. By these operations, the loop or eye has been formed on the rod, as shown in Fig. 8. By the time the ball 32 reaches the socket 26, the operations just described will have been performed. The seating of the ball in said socket 26 again effects an interlocking of the spirally-grooved sleeve with the spindle. The operation of the clutch mechanism, already described, is so timed that, when this latter interlocking of the sleeve with the spindle is effected, the L-shaped portion of the clutch pin will have engaged the offset portion 21 of the disk 21, whereupon the disk and gear are disconnected. This then permits the spring 39 to effect its function of returning the reciprocating member to normal postion, and the sleeve, in turn, (by bing interlocked with the spindle 26) restores the same to its starting position. Thereupon, when the rear end of the spindle engages the buffer 31, the spindle is held against further movement while the encircling sleeve continues its further rearward movement to unseat the ball 32 from the socket 26 and again position it in the recess 26 The parts are then in their original position and ready to be thrust forward by the segmental gear, as already described. By means of the buffers 29'" and 31 jar and strain to the parts is eliminated when the spindle and sleeve engage the same. Thereafter, the operator is enabled to withdraw the completed eye-rod and he may then conveniently deposit it in the tray 54 suitably mounted on one of the legs 2.

As will be seen, the parts and mechanisms are intermittently operated. To provide for a continuous operation thereof, I have arranged means whereby the clutch pin may be controlled without necessity of the operator actuating the treadle to effect a starting of the parts. This result is attained by latching the treadle when in its depressed position by means of a latch 55 pivotally mounted at the lower end of one of the legs 2 of the frame of the machine. It will be understood that, by this means, the link mechanism is caused to hold the clutch pin against being moved out of the path of the lug 9 of the clutch disk 9, so that the clutch pin is only positioned out of the path of the collar 9 on the disk 9 at the end of its forward stroke. When it shall have returned to normal position,'the continued rotation of the disk 9 will carry the pin past the offset portion 20 of the disk 20 without its engaging therewith. In other words, the continuous operation is effected by holding the treadle-actuated disk 20 out of operative engagement with the clutch pin 14. Thus, the clutch pin 14: engages only the ofi'setportion 21 of the disk 21, which intern'littently effects a disengagement of the clutch members to permit return of the reciprocating member 23, and connected parts, to starting position.

By reason of the adjustable mounting of certain of the parts, already referred to, I am enabled to adapt the device for forming eyes or loops upon rods of various sizes, to meet requirements. The gage plate 46 determines the amount of stock which is to be bent around the arbor to form the loop or eye. The size of the arbor of course determines the size of the eye or loop. This arbor therefore is interchangeable to enable the formation of various sizes of loops. l/Vhen a different size arbor is placed in operative position, the bender blocks 48 and 51 may be adjusted in relation thereto to provide for the change in size of the loop or eye. Similarly, if the size of the work stock is changed, these members are adjusted to meet these conditions. To effect a change in the time of engagement of the offset portion 21 with the L-shaped extension of the clutch pin, the disk 21 is arranged for a slight adjustment. To this end, the longitudinal strip or plate 22 is provided with an arc-shaped slot 22, through which the adjusting bolt 21, carried by the disk 21, extends. The disk may, therefore, be adjusted concentrically, to the axis of the shaft 4, and this determines the time of engagement of the extension 21 with the clutch pin, as already referred to.

While I have herein described the details of my construction, it is 1'1evertheless to be understood that I do not limit myself to such details, except in so far as the same are specified in the claim.

Having thus "fully described my invention, its construction and mode of operation, what I claim as new and desire to secure by Letters Patent is:

1. In a bending machine, the combination of a work supporting die, a member traveling to and from too same, a bending die to cooperate with the work supporting die in bending the work supported by said member and movable longitudinally in relation thereto, and automatically acting means tor interlocking said bending die and member in dilt'erent longitudinal positions.

In a bending machine, a support, a reciprocating member sustained thereby, means for actuating said reciprocating member, including a segmental gear, a clutch device intermittently engaging therewith, means for actuating said clutch device, in combination with a bender device supported by and movable with said reciprocating member, and means for actuating said bender device relatively to said reciprocating member.

0. in a bending machine, a support, a reciprocating member sustained thereb means tor actuating said reciprocating member, including a segmental gear, a clutch device intermittently engaging therewith, means for actuating said clutch device, in combination with a bender device supported by and movable with said reciprocating member, and adjusting means for var ving the actuation of said reciprocating memher.

4. In a rod-bending machine, the combination. ot a support, a reciprocating member movably sustained thereby, a beuder-operating element supported by said reciprocating member, and means for interlocking said element and reciprocating member comprising a ball adapted to loekingly engage said. element, and means for actuating said reciprocating member.

In a rod-bending machine, the combination of a support, a movable member sus tained thereby, a bender-operating device siuuiorted by and movable with said movable member, a power actuated device connecting with and adapted to actuate said reciprocating member, means for connecting said power actuated device with said reciprocating member, means for controlling the connection between said power device and the reciprocating member, whereby the latter may be given a continuous reciprocation, and means for intermittently actuating said bender device.

(3. in a bending machine, the combination roses re mounted thereon, means on the frame for positioning a rod with its end tr e, a bend ing device mounted 011 the frame and movable up to the rod to position said device relative to the free end of the rod, means for moving said bending device up to the rod, and means for rotating said bending device about its axis oi movement to bend the rod laterally around the mandrel.

In a bending machine, the combination of a frame, a horizontally fixed mandrel about which the stock is adapted to be bent, a spindle mounted on the frame and slidable longitudinally to and from the mandrel, said spindle being rotatable about its longi tudinal axis, a block on the end of the spindle adapted in the rotary movement of the spindle to engage and bend the stock around the mandrel, and means for imparting to the spindle, first, a longitudinal movement to position the bending block relative to the stock, and then a rotary motion to cause the block to bend the stock around the mandrel.

S. In a bending machine, the combination of a frame, a mandrel mounted thereon, and about which mandrel the stock is adapted to be bent, a. spindle mounted on the frame, movable longitudinally to and from the mandrel, and rotatable about its longitudi nal axis, said spindle being adapted to be arrested in its longitudinal movement, abloclr on the end of the spindle adapted by the movement of the spindle up to the mandrel to be positioned to one side of the mandrel, means for moving the spindle longitudinally to the mandrel, and means acting automatically when the longitudinal. movement of the spindle is arrested to rotate the same to perform the bending operaticn.

In a bending machine, the combimrtion of a frame, a mandrel thereon, a bending block sustained by the frame, said block being movable to and from the mandrel and being rotatable about its axis of movement, means tor arresting the motion of the bend.- ing block toward the mandrel to position the block relative "to the work, preparatory to performing the bending action, and means controlled by the arrest of the bending block for automatically rotating the same to perform the bending operation.

10. in a bending machine, the combination of a frame, a mandrel thereon, a sleeve slid able longitudinally toward and from the mandrel and provided with a spiral groove, a spindle slidingly mounted. within the sleeve and having a pin extending in said groove, and having also means for bending the stock around the mandrel when the spindle is rotated, mechanism for moving the sleeve longitudinally toward the mandrel to advance the spindle, and means for arrestof a. suitable supporting frame, a mandrel 1 ing the advance of spindle; whereby the continned movement or" the sleeve will act automatically to rotate the spindle and actuate the bending means.

11. In a bending machine, the combination of a frame, a mandrel thereon about which the stock is adapted to be bent, a head mounted on the frame and movable toward the mandrel and rotatable about its axis of movement, said head being provided with means for bending the stock around the mandrel when the head is rotated, means for moving the head toward the mandrel to position the bending means relative to the stock, and means actmg automatlcally 0n the positioning of the parts, to rotate the 15 CARL J. CRONANDER.

Witnesses:

L. C. BLANDING, C. A. BANISTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

